1 error[E0658]: `macro` is experimental (see issue #39412)
2 --> $DIR/feature-gate-decl_macro.rs:13:1
4 LL | macro m() {} //~ ERROR `macro` is experimental (see issue #39412)
7 = help: add #![feature(decl_macro)] to the crate attributes to enable
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0658`.